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RNC group in 2001 Ian Johnson Fabrice Retiere Art Poskanzer Nu Xu student from South Africa David Hardtke Peter Jacobs Jay Marx Howard Wieman Jim Thomas.

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Presentation on theme: "RNC group in 2001 Ian Johnson Fabrice Retiere Art Poskanzer Nu Xu student from South Africa David Hardtke Peter Jacobs Jay Marx Howard Wieman Jim Thomas."— Presentation transcript:

0 Collectivity makes the world go around
Kai Schweda Physikalisches Institut University of Heidelberg / GSI Darmstadt Hans Georg Ritter Symposium 3/15/13

1 RNC group in 2001 Ian Johnson Fabrice Retiere Art Poskanzer Nu Xu student from South Africa David Hardtke Peter Jacobs Jay Marx Howard Wieman Jim Thomas Jennifer Klay Jinghua Fu Eugene Yamamoto Masashi Kaneta Falk Meissner Hans Georg Howard Matis Kirill Filimonov me Grazyna Odyniec 3/15/13

2 on top of the world Hans Georg

3 high-energy nucleus-nucleus collisions

4 central collision collision happens here size ~10fm
4000 charged particles illuminates TPC volume size ~4m

5 Hans Georg Ritter Symposium
STAR year 2 data White papers - STAR: Nucl. Phys. A757, p102. 3/15/13 Hans Georg Ritter Symposium

6 Collectivity observed in spectra
strongly curved  strong flow exponential  no flow More central collisions STAR: Phys. Rev. C70, (R). 3/15/13 Hans Georg Ritter Symposium

7 matter flows - collectivity
Nu Xu plot 2.0 strange matter flows bulk matter flows STAR Data: Nucl. Phys. A757, (2005) 102. partonic collectivity ? 3/15/13 Hans Georg Ritter Symposium

8 Anisotropy Parameter v2
coordinate-space-anisotropy  momentum-space-anisotropy y py x px Initial/final conditions, EoS, degrees of freedom

9 discovery of partonic collectivity
elliptic flow of (multi-) strange f and W and quark number scaling: first observed in L and K0S PhD theses of Jinghua Fu, Wuhan/LBNL and Paul Sorensen, UCLA/LBNL  partonic collectivity S. Voloshin, QM02, 379c (2003) STAR, PRC 75, (2007) STAR, PRL 95, (2005) STAR, PRL 95, (2005) PHENIX, PRL 98, (2007)

10 Hans Georg Ritter Symposium
higher harmonics extract power spectrum of vn, like WMAP* higher harmonics odd harmonics important v3: access h/s STAR, arXiv: [nucl-ex]; STAR, PRL 92 (2004) ; Mocsy and P. Sorensen, NPA 855 (2011) 241; B. Alver and G. Roland, PRC 81 (2010) ; *WMAP data: The NASA/WMAP Science team; QGP plot: B. Schenke, S. Jeon, and C. Gale, arXiV: 3/15/13 Hans Georg Ritter Symposium

11 everything counts in large amounts
M. Sumbera, arXiv: [nucl-ex]. 3/15/13 Hans Georg Ritter Symposium

12 entering the anti-world
STAR, Nature 473 (2011) 353. anti-alpha discovered rarest signal in HI ever observed (2/108) 3/15/13 Hans Georg Ritter Symposium

13 Hans Georg Ritter Symposium
STAR: key to success large acceptance Hans Georg low-pT coverage large data sets excellent PID 3/15/13 Hans Georg Ritter Symposium

14 Hans Georg Ritter Symposium
Go heavy or go home ! new scale: mc,b » QCD mc,b ≈ const. mu,d,s ≠ const. X. Zhu, M. Bleicher, S.L. Huang, K.S., H. Stöcker, N. Xu, and P. Zhuang, PLB 647 (2007) 366. 3/15/13 Hans Georg Ritter Symposium

15 Where does all the charm go ?
J/(charmonium) c D*+ Ds D0 Total charm cross section: open-charmed hadrons, e.g. D0, D+, D*+, c, … and c,b  e() + X Quarkonia, e.g. J/ carries 1% of total charm 3/15/13 Hans Georg Ritter Symposium

16 Open-charm production
at RHIC: large combinatorial background PhD thesis Xin Dong USTC/LBNL STAR upgrade with Heavy Flavor Tracker will impose high precision STAR, PRD 85 (2012) ; ALICE, JHEP 1207 (212) 191. 3/15/13 Hans Georg Ritter Symposium

17 Heavy-quark detection
golden channel: D0  K- +  , c = 123 m displaced decay vertex is signature of heavy-quark decay plot: courtesy of D. Tlusty. 3/15/13 Hans Georg Ritter Symposium

18 Hans Georg Ritter Symposium
Heavy Flavor Tracker HFT SSD IST PXL 3/15/13 Hans Georg Ritter Symposium

19 The Heavy Flavor Tracker for STAR
Hans Georg with an HFT prototype 10 mm precision demonstrated 10 weeks of running in 2014 will decisively address open charm at RHIC

20 Hans Georg Ritter Symposium
some more statistics STAR white paper: Nucl. Phys. A757 (2005) most cited RHIC paper - most cited HI experimental paper Bjorken, PRD 27 (1983) Mastsui and Satz, PLB 178 (1986) 3/15/13 Hans Georg Ritter Symposium

21 populating the world …

22 Dan Cebra Javier Castillo Xin Dong
Dan Cebra Javier Castillo Xin Dong Kirill Filimonov Jinghua Fu Tom Gutierrez Davis CEA LBNL Berkeley Wuhan San Luis Obispo Ian Johnson Masashi Kaneta Jennifer Klay Marco v. Leuween Mike Lisa Spiros Margetis PSI Tohoku San Luis Obispo Utrecht Ohio State Kent State Joakim Nystrand Joern Putschke Fabrice Retiere Lijuan Ruan ks Raymond Snellings Bergen Wayne State Triumf BNL Heidelberg Utrecht Bedangadas Mohanty Bhubaneswar Paul Sorensen BNL Fuqiang Wang Purdue Sevil Salur Rutgers

23 Hans Georg Ritter Symposium
some personal remarks ‘cultural shock’: - flat hierarchies, informal style - took me 6 months to get over it can you think about charm ? Hans Georg in 2001 Berkeley style: - people doing the work are getting exposed, i.e. plenary talks, committees, … 3/15/13 Hans Georg Ritter Symposium

24 Happy 69½ Birthday, Hans Georg !


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